EP0483082A2 - Circuit pour contrôler une lampe à décharge sur un véhicule - Google Patents
Circuit pour contrôler une lampe à décharge sur un véhicule Download PDFInfo
- Publication number
- EP0483082A2 EP0483082A2 EP91830436A EP91830436A EP0483082A2 EP 0483082 A2 EP0483082 A2 EP 0483082A2 EP 91830436 A EP91830436 A EP 91830436A EP 91830436 A EP91830436 A EP 91830436A EP 0483082 A2 EP0483082 A2 EP 0483082A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- signal
- voltage
- input
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/382—Controlling the intensity of light during the transitional start-up phase
- H05B41/386—Controlling the intensity of light during the transitional start-up phase for speeding-up the lighting-up
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
- H05B41/2882—Load circuits; Control thereof the control resulting from an action on the static converter
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/07—Starting and control circuits for gas discharge lamp using transistors
Definitions
- the present invention relates to a device for controlling a gas-discharge lamp, particularly for use in a motor vehicle, including: a supply device for the lamp, having an input for connection to the battery of the vehicle and an output for connection to the lamp and including an inverter with a control input for receiving a control signal which can modify the electrical power supplied to the lamp, regulating circuitry connected to the lamp and to the control input of the supply circuit for detecting the voltage across the lamp and the current flowing through the lamp and for applying to the control input of the supply device a control signal for causing a high electrical power to be supplied during the switching-on and warming-up of the lamp and a subsequent reduction of the power to a predetermined operating level.
- GDLs Gas-discharge lamps or GDLs have been proposed recently for use in motor vehicles, particularly for dipped headlights. These lamps have to be supplied with a high electrical power when they are switched on in order rapidly to evaporate the metal halides and the mercury they contain in order to generate visible light with a rich spectrum.
- the lamp For use in motor vehicles, the lamp must light quickly.
- the VEDILIS Vehicle Discharge Light System
- This drawing shows a graph of the current I flowing in the lamp on the ordinate as a function of the voltage V across the lamp on the abscissa.
- the VEDILIS project recommends that the lamp is supplied with a maximum current I MAX of 2.6 amperes (effective value) during the warm-up stage, that is, until a supply of 75 W is reached, as indicated by the line A in the graph of Figure 1.
- the hyperbola a represents the upper limit of the power to be supplied to the lamp.
- the outline defined by the VEDILIS project therefore provides for a hyperbolic limit line B on the hyperbola a from the limit line A to the attainment of a voltage of 40V across the lamp.
- the power supplied to the lamp must be reduced gradually in an arbitrary manner until it reaches the hyperbola b corresponding to the operating power, for example 35W, to be supplied to the lamp.
- the limit lines relating to transitions between the hyperbolas a and b and to the final line of the hyperbola b are indicated C and D in Figure 1.
- the lines A, B, C and D must not be crossed during the piloting of a gas-discharge lamp.
- the time curve of the luminous flux generated by a gas-discharge lamp changes appreciably, however, during the piloting of the lamp, according to movements within the I,V plane under the limit outline defined above.
- the luminous flux has an initial peak and then a sudden drop to a minimum value followed by a gradual increase to a final limit value.
- the luminous flux has a marked initial peak (overshoot) followed by a sudden drop and then starts to increase gradually to a limit value.
- the initial peak of the luminous flux and the sudden drop which immediately follows it are particularly problematical.
- the duration and relative values of the initial peak and the following reduction in brightness are particularly affected by the manner in which the transition is made from the power level associated with the hyperbola a to the operating power level corresponding to the hyperbola b .
- the object of the present invention is to provide a system for controlling a gas-discharge lamp of the type specified above which achieves a good time curve for the luminous flux emitted without the need for an optical feedback system.
- the regulating circuitry comprises: means for generating signals indicative of a reference current which is variable in steps and, during successive time intervals defined by a clock-signal generator, decreases according to respective predetermined functions as the voltage detected across the lamp increases, these functions corresponding substantially to respective predefined constant values of the power supplied to the lamp, and comparator means for comparing the reference-current values generated with the current detected in the lamp and, in dependence on the difference between them, generating an error signal usable for generating the control signal for the device for supplying the lamp.
- a gas-discharge lamp is indicated L.
- the lamp is connected to the output of a supply device 1 of known type whose input can be connected to the battery 2 of the vehicle by the operation of a control switch 3.
- a resistor 4 is connected between the lamp L and earth.
- a regulating device has an input 5a connected to the terminal of the lamp L which is connected to the supply 1 and an input 5b connected to the non-earthed terminal of the resistor 4.
- the inputs 5a and 5b of the regulating device 5 receive voltage signals indicative of the voltage applied to the terminals of the lamp L and of the current flowing through the lamp, respectively.
- the supply device 1 includes, for example, an inverter 1b with a control input 1a for receiving a control signal which can modify the electrical power supplied to the lamp L.
- the regulating device 5 In operation, the regulating device 5 generates a control signal on the basis of the detected values of the voltage across the lamp L and of the current flowing through the lamp and the signal is applied to the control input 1a of the supply device so as to drive the inverter 1b in a manner such that the voltage and the current in the lamp behave in a predetermined manner during the switching-on and warming-up stages.
- the regulating device 5 includes a comparator circuit 10 including a differential amplifier 11 with an RC feedback loop 12 between its inverting input and its output.
- the non-inverting input of the amplifier is connected to the non-earthed terminal of the resistor 4.
- the terminal of the lamp L which is not connected to the resistor 4 is connected to the input of a threshold comparator 13 which compares the voltage across the lamp (the voltage across the resistor 4 being negligible) with a reference voltage generated by a resistive divider 14.
- An amplifier circuit generally indicated 15, has an input 15a connected to the input terminal 5a of the regulating circuit 5 and hence to the lamp L.
- the amplification circuit 15 includes an operational amplifier 16 with a feedback resistor 17 between its inverting input and its output and a resistor 18 between its non-inverting input and earth.
- the inverting input of the amplifier 16 is connected to the output of a multiplexer 19 having a plurality of inputs to which first terminals of (for example, six) resistors, indicated 20 to 25, are connected, the second terminals thereof being connected to each other and to the input terminal 5a.
- the non-inverting input of the operational amplifier 16 is connected to the output of a multiplexer 29 having a plurality of inputs connected to first terminals of (for example six) resistors 30, 31 ... 35.
- the other terminals of these resistors are connected to a stabilised direct-current voltage supply V cc (not shown).
- Each multiplexer 19 or 29 has three addressing inputs connected to the outputs of a counter 40 with an input connected to the output of an oscillator 41 which acts as a clock-pulse generator.
- the counter 40 has an enabling input 40a connected to the output of the threshold comparator 13.
- the threshold comparator 13 When the threshold comparator 13 enables the counter 40 to count, the latter outputs address bit-combinations in sequence at a rate defined by the clock-pulse generator 41.
- the sequence of the addresses is such that the inverting and non-inverting inputs of the operational amplifier 16 are first connected respectively to the resistors 20 and 30 and then to the resistors 21 and 31, and so on.
- the amplifier circuit 15 applies different laws for decreasing its output signal linearly in dependence on its input signal, according to which pair of resistors is connected selectively to the inverting and non-inverting inputs of the operational amplifier 16.
- the output of the amplification circuit 15 is connected to the input of a chopper or limiter circuit 50 which limits the amplitude of the signal to a predetermined value.
- the limiter or chopper circuit 50 is formed in known manner with the use of an operational amplifier 51, a rectifier diode 52 and a voltage divider 53 connected in the manner shown in Figure 3.
- the output of the limiter circuit is connected to the inverting input of the differential comparator circuit 10 by means of a voltage-follower disconnection stage 60.
- the amplification circuit 15, the limiter 50 and the amplifier 60 together constitute a chain which supplies the differential comparator circuit 10 with a reference signal indicative of a reference value for the current in the lamp L, which is variable in steps and, during successive time intervals defined by the clock-pulse generator 41, decreases according to respective predetermined functions as the voltage across the lamp increases; the functions conveniently correspond to predefined constant values of the power supplied to the lamp, the power values being between those associated with the hyperbola a and the hyperbola b of Figures 1 and 4.
- the differential comparator circuit 10 supplies an output signal to the base of a driver transistor 70 whose collector represents the output of the regulating device 5 as a whole.
- the straight line m corresponds to currents higher than the value I max and the chopper circuit 50 therefore limits the amplitude of the signal output by the amplification circuit so that the differential comparator circuit 10 drives the transistor 70 in a manner such that the supply device 1 tends to keep the current in the lamp substantially constant and equal to the value I max .
- the intervention of the chopper circuit 50 ceases as soon as the voltage and the current in the lamp L reach values corresponding to the point indicated F in Figure 4. From this point and until the point indicated G, corresponding to a voltage of 40V across the lamp, is reached, the amplification circuit 15 applies to the inverting input of the differential comparator circuit 10 a signal corresponding to a reference current which effectively decreases according to the straight line m of Figure 4.
- the threshold comparator 13 enables the counter circuit 40 to count.
- the counter sends addressing signals to the multiplexers 19 and 29 such that the resistors 21 and 31 are now connected to the operational amplifier 16.
- the amplification circuit 15 then applies to the differential comparator circuit 10 a signal indicative of a reference current which decreases linearly according to the straight line n of Figure 4.
- the operation then continues in a similar manner and, during successive time intervals defined by the clock-pulse generator 41, the reference value for the current in the lamp generated by the amplification circuit 15 behaves successively according to portions of successive straight lines, indicated o, p, q and r in Figure 4.
- the final straight line r is tangential to a point on the portion D of the hyperbola b of Figure 1 and thus approximates to the constant-power hyperbola corresponding to the operating power to be supplied to the lamp L.
- the counter 40 is of the bidirectional (up/down) type and has an input, indicated 40b, for controlling the direction of counting.
- This input of the counter 40 is connected to an output 80a of a logic circuit 80 which has a further input 80b connected to the input of the supply device 1, downstream of the switch 3 which switches the lamp L on and off.
- the input 80b of the logic circuit 80 is intended, in particular, to detect the opening of the switch 3 to switch off the lamp.
- the logic circuit 80 causes the counter 40 to count backwards (decremental counting) at a predetermined rate.
- the count of the counter 40 does not start again from 000 (the address corresponding to the application of the straight line m of Figure 4) but starts from a count or address corresponding to an intermediate straight line, so as not to repeat the entire warm-up stage which would be unnecessary and could damage the lamp.
- the counter If the counter returns to 000 after the switch 3 has been opened, the counter supplies a signal from an output CO (the "carry-out” output) to the logic circuit 80 which opens a switch 90 to cut off the supply to the counter 40. In effect, the counter is supplied with the voltage V z developed across a Zener diode 91 between the switch 90 and earth.
- the regulating circuit according to Figure 3 thus enables the lamp L to be controlled according to the graph of Figure 4.
- the number of approximating straight lines used in the transition between the power levels associated with the hyperbolas a and b may be larger or smaller than that shown by way of example.
- the regulation method of the invention may also be carried out by a programmed logic device, that is, with the use of a microprocessor.
- the transition from the warm-up power level to the operating power level can be achieved by varying the reference current in steps so that, during successive time intervals, it decreases according to hyperbolic functions and not according to approximating straight lines.
- the voltage reached across the lamp when it is running can be stored. This information can be used when the lamp is subsequently switched on again in order correspondingly to control the power supplied to the lamp during the warm-up stage.
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Spectrometry And Color Measurement (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT06781290A IT1247762B (it) | 1990-10-22 | 1990-10-22 | Dispositivo di controllo per una lampada a scarica di gas per l'impiego a bordo di un autoveicolo |
IT6781290 | 1990-10-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0483082A2 true EP0483082A2 (fr) | 1992-04-29 |
EP0483082A3 EP0483082A3 (en) | 1992-11-19 |
EP0483082B1 EP0483082B1 (fr) | 1996-09-04 |
Family
ID=11305471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91830436A Expired - Lifetime EP0483082B1 (fr) | 1990-10-22 | 1991-10-15 | Circuit pour contrÔler une lampe à décharge sur un véhicule |
Country Status (6)
Country | Link |
---|---|
US (1) | US5151634A (fr) |
EP (1) | EP0483082B1 (fr) |
JP (1) | JPH04264393A (fr) |
DE (1) | DE69121836T2 (fr) |
ES (1) | ES2091901T3 (fr) |
IT (1) | IT1247762B (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4313195A1 (de) * | 1992-04-23 | 1993-10-28 | Mitsubishi Electric Corp | Beleuchtungsvorrichtung mit Entladungslampe |
EP0605052A1 (fr) * | 1992-12-28 | 1994-07-06 | Koninklijke Philips Electronics N.V. | Ballast pour lampe à décharge |
FR2707054A1 (en) * | 1993-06-21 | 1994-12-30 | Valeo Vision | DC converter for supplying an electric load, especially a fluorescent tube |
WO1997011581A1 (fr) * | 1995-09-20 | 1997-03-27 | Robert Bosch Gmbh | Unite de commande pour un allumage rapide d'une lampe a decharge a haute pression |
DE19622807A1 (de) * | 1996-06-07 | 1997-12-11 | Mitronic P Miller Gmbh | Leistungsregelung von Bogenlampen |
EP0989785A2 (fr) * | 1998-08-26 | 2000-03-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit amélioré pour lampe à décharge basse pression |
WO2004030420A1 (fr) * | 2002-09-25 | 2004-04-08 | Matsushita Electric Works, Ltd. | Ballast electronique pour lampe a decharge |
EP1453363A1 (fr) * | 2003-02-25 | 2004-09-01 | Harison Toshiba Lighting Corporation | Appareil d'illumination de lampe à décharge de vapeur métallique à haute pression et dispositif de phare pour véhicules |
EP2043408A3 (fr) * | 2007-09-25 | 2009-04-08 | Osram-Sylvania Inc. | Procédé de commande et ballast pour montée en charge d'une lampe à halogénures métallisés |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3280475B2 (ja) * | 1993-08-03 | 2002-05-13 | 池田デンソー株式会社 | 放電灯点灯装置 |
JP3447776B2 (ja) * | 1993-09-17 | 2003-09-16 | 池田デンソー株式会社 | 放電灯点灯装置 |
US5479076A (en) * | 1994-06-07 | 1995-12-26 | Eastman Kodak Company | Current mode restart circuit for a dc arc lamp |
JP3606909B2 (ja) * | 1994-07-12 | 2005-01-05 | 三菱電機株式会社 | 交流放電灯点灯装置 |
JP3197166B2 (ja) * | 1994-09-02 | 2001-08-13 | 株式会社小糸製作所 | 放電灯の点灯回路 |
JP3174993B2 (ja) * | 1995-05-12 | 2001-06-11 | 株式会社小糸製作所 | 放電灯点灯回路 |
DE29616655U1 (de) * | 1996-09-26 | 1998-02-05 | Robert Bosch Gmbh, 70469 Stuttgart | Anordnung zum Erkennen des Zustandes einer Hochdruck- Gasentladungslampe beim Einschalten |
DE19734359A1 (de) * | 1997-08-08 | 1999-02-18 | Bosch Gmbh Robert | Verfahren zur Generierung des Stromsollwertes für ein Steuergerät für den schnellen Lichtanlauf einer Hochdruck-Gasentladungslampe |
JP2001069667A (ja) * | 1999-08-31 | 2001-03-16 | Yazaki Corp | 車両用ランプ点灯駆動装置 |
JP2003151787A (ja) * | 2001-08-29 | 2003-05-23 | Harison Toshiba Lighting Corp | 高圧放電ランプ点灯装置および自動車用ヘッドライト装置 |
US10582652B2 (en) | 2015-11-02 | 2020-03-10 | The Charles Machines Works, Inc. | Hydraulic control system |
US10114404B2 (en) | 2015-11-02 | 2018-10-30 | The Charles Machine Works, Inc. | Hydraulic control system |
US11608613B2 (en) | 2019-08-21 | 2023-03-21 | The Charles Machine Works, Inc. | Throttle control system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2080054A (en) * | 1980-07-07 | 1982-01-27 | Nuarc Co | Hid lamp power supply |
EP0383692A2 (fr) * | 1989-02-16 | 1990-08-22 | Nissan Motor Co., Ltd. | Circuit et méthode pour commander l'intensité lumineuse de lampes à décharge |
FR2648000A1 (fr) * | 1989-06-02 | 1990-12-07 | Koito Mfg Co Ltd | Circuit d'allumage pour lampe a decharge sous haute pression pour vehicules |
EP0408121A2 (fr) * | 1989-07-10 | 1991-01-16 | Philips Electronics North America Corporation | Circuit |
EP0415496A2 (fr) * | 1989-08-31 | 1991-03-06 | Philips Patentverwaltung GmbH | Circuit pour alimenter une lampe à décharge |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004188A (en) * | 1975-09-26 | 1977-01-18 | General Electric Company | Starting circuit for inverter operated gaseous discharge lamps |
US4240009A (en) * | 1978-02-27 | 1980-12-16 | Paul Jon D | Electronic ballast |
US4511195A (en) * | 1983-06-30 | 1985-04-16 | Beckman Instruments, Inc. | Device for starting and operating gas discharge tubes |
US4749913A (en) * | 1987-04-17 | 1988-06-07 | General Electric Company | Operating circuit for a direct current discharge lamp |
JPH0766864B2 (ja) * | 1989-07-28 | 1995-07-19 | 東芝ライテック株式会社 | 放電灯点灯装置 |
DE3928881A1 (de) * | 1989-08-31 | 1991-03-14 | Niepenberg Dalex Werke | Diodenanordnung in widerstandsschweissmaschinen |
US5047695A (en) * | 1990-02-20 | 1991-09-10 | General Electric Company | Direct current (DC) acoustic operation of xenon-metal halide lamps using high-frequency ripple |
-
1990
- 1990-10-22 IT IT06781290A patent/IT1247762B/it active IP Right Grant
-
1991
- 1991-10-15 ES ES91830436T patent/ES2091901T3/es not_active Expired - Lifetime
- 1991-10-15 DE DE69121836T patent/DE69121836T2/de not_active Expired - Fee Related
- 1991-10-15 EP EP91830436A patent/EP0483082B1/fr not_active Expired - Lifetime
- 1991-10-21 US US07/779,858 patent/US5151634A/en not_active Expired - Fee Related
- 1991-10-22 JP JP3274047A patent/JPH04264393A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2080054A (en) * | 1980-07-07 | 1982-01-27 | Nuarc Co | Hid lamp power supply |
EP0383692A2 (fr) * | 1989-02-16 | 1990-08-22 | Nissan Motor Co., Ltd. | Circuit et méthode pour commander l'intensité lumineuse de lampes à décharge |
FR2648000A1 (fr) * | 1989-06-02 | 1990-12-07 | Koito Mfg Co Ltd | Circuit d'allumage pour lampe a decharge sous haute pression pour vehicules |
EP0408121A2 (fr) * | 1989-07-10 | 1991-01-16 | Philips Electronics North America Corporation | Circuit |
EP0415496A2 (fr) * | 1989-08-31 | 1991-03-06 | Philips Patentverwaltung GmbH | Circuit pour alimenter une lampe à décharge |
Non-Patent Citations (1)
Title |
---|
VEDILIS EUREKA PROJECT 273 : System specifications for field test. * |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4313195A1 (de) * | 1992-04-23 | 1993-10-28 | Mitsubishi Electric Corp | Beleuchtungsvorrichtung mit Entladungslampe |
DE4313195C2 (de) * | 1992-04-23 | 2002-08-01 | Mitsubishi Electric Corp | Schaltungsanordnung zum Betreiben einer Hochdruck-Entladungslampe |
EP0605052A1 (fr) * | 1992-12-28 | 1994-07-06 | Koninklijke Philips Electronics N.V. | Ballast pour lampe à décharge |
US5382881A (en) * | 1992-12-28 | 1995-01-17 | North American Philips Corporation | Ballast stabilization circuitry for eliminating moding or oscillation of the current envelope in gas discharge lamps and method of operating |
FR2707054A1 (en) * | 1993-06-21 | 1994-12-30 | Valeo Vision | DC converter for supplying an electric load, especially a fluorescent tube |
WO1997011581A1 (fr) * | 1995-09-20 | 1997-03-27 | Robert Bosch Gmbh | Unite de commande pour un allumage rapide d'une lampe a decharge a haute pression |
DE19622807A1 (de) * | 1996-06-07 | 1997-12-11 | Mitronic P Miller Gmbh | Leistungsregelung von Bogenlampen |
US6163114A (en) * | 1998-08-26 | 2000-12-19 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Starting circuit for low-pressure discharge lamp |
EP0989785A3 (fr) * | 1998-08-26 | 2000-04-12 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit amélioré pour lampe à décharge basse pression |
EP0989785A2 (fr) * | 1998-08-26 | 2000-03-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit amélioré pour lampe à décharge basse pression |
WO2004030420A1 (fr) * | 2002-09-25 | 2004-04-08 | Matsushita Electric Works, Ltd. | Ballast electronique pour lampe a decharge |
US7002305B2 (en) | 2002-09-25 | 2006-02-21 | Matsushita Electric Works, Ltd. | Electronic ballast for a discharge lamp |
DE10392169B4 (de) * | 2002-09-25 | 2010-06-10 | Panasonic Electric Works Co., Ltd., Kadoma-shi | Elektronisches Vorschaltgerät für eine Entladungslampe |
EP1453363A1 (fr) * | 2003-02-25 | 2004-09-01 | Harison Toshiba Lighting Corporation | Appareil d'illumination de lampe à décharge de vapeur métallique à haute pression et dispositif de phare pour véhicules |
US6960886B2 (en) | 2003-02-25 | 2005-11-01 | Harison Toshiba Lighting Corp. | High-pressure metal-vapor discharge lamp lighting apparatus and headlight device for automobile |
CN100450325C (zh) * | 2003-02-25 | 2009-01-07 | 哈利盛东芝照明有限公司 | 高压金属蒸气放电灯开灯装置及汽车用前照灯装置 |
EP2043408A3 (fr) * | 2007-09-25 | 2009-04-08 | Osram-Sylvania Inc. | Procédé de commande et ballast pour montée en charge d'une lampe à halogénures métallisés |
US7589477B2 (en) | 2007-09-25 | 2009-09-15 | Osram Sylvania Inc. | Control method and ballast for run-up of metal halide lamp |
Also Published As
Publication number | Publication date |
---|---|
ES2091901T3 (es) | 1996-11-16 |
DE69121836D1 (de) | 1996-10-10 |
DE69121836T2 (de) | 1997-02-06 |
EP0483082A3 (en) | 1992-11-19 |
IT9067812A1 (it) | 1992-04-22 |
EP0483082B1 (fr) | 1996-09-04 |
US5151634A (en) | 1992-09-29 |
IT1247762B (it) | 1994-12-30 |
JPH04264393A (ja) | 1992-09-21 |
IT9067812A0 (it) | 1990-10-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5151634A (en) | Device for controlling a gas-discharge lamp for use in a motor vehicle | |
EP2885575B1 (fr) | Procédé et appareil pour commander une intensité lumineuse en fonction de fluctuations d'une tension | |
AU642726B2 (en) | Method for starting a high-pressure-gas discharge lamp in motor vehicles | |
EP0723326A2 (fr) | Chargeur de batterie | |
KR100278886B1 (ko) | 차량용 발전기의 제어장치 | |
US4968917A (en) | Electronic dimmer control for vacuum fluorescent display devices | |
US4388587A (en) | Fixed frequency voltage regulator | |
CA1165391A (fr) | Controleur declenche par la phase sans decalage | |
US5751121A (en) | High voltage discharge bulb control | |
EP3641504A1 (fr) | Circuit intégré, circuit de commande de diode électroluminescente à intensité variable et procédé de commande | |
US4388586A (en) | Fixed frequency voltage regulator | |
DE10044428A1 (de) | Entladungslampenvorrichtung für Fahrzeuge | |
JP3283160B2 (ja) | 低圧蛍光ランプのための制御装置 | |
GB2355603A (en) | Discharge lamp device for vehicle | |
US5896487A (en) | Opto-electrically controlled direct current motor speed control circuit | |
GB2284283A (en) | Circuit utilising the resistance of a switching transistor for load current measurement | |
EP0081891B1 (fr) | Régulateur de tension à fréquence constante | |
JP3379325B2 (ja) | 放電灯点灯装置 | |
JPH06302883A (ja) | 半導体レーザ駆動装置 | |
JP3557665B2 (ja) | 照明装置 | |
US6194951B1 (en) | Method and device for diving an integrated power output stage | |
JPH0632599B2 (ja) | 車輌用交流発電機の電圧調整器 | |
US7237912B2 (en) | Method for actuating a dimmable mirror | |
KR100340874B1 (ko) | 차량용 배터리의 충전 제어회로 | |
JP3182427B2 (ja) | 車輌用電圧調整器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE ES FR GB NL SE |
|
17P | Request for examination filed |
Effective date: 19930213 |
|
17Q | First examination report despatched |
Effective date: 19950119 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MAGNETI MARELLI S.P.A. |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB NL SE |
|
REF | Corresponds to: |
Ref document number: 69121836 Country of ref document: DE Date of ref document: 19961010 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2091901 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
ET1 | Fr: translation filed ** revision of the translation of the patent or the claims | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20020830 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20020903 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020916 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020919 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020924 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20021030 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031015 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031016 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031016 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040501 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040501 |
|
EUG | Se: european patent has lapsed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20031015 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040630 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20040501 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20031016 |